Sometimes, we may require to hide show password input field so, user can see what he written in password in register form or any other form. So, If you used Bootstrap framework then you can simply do it by using bootstrap-show-password.js plugin.
Bootstrap show Password plugin give us to good layout and with we can also custom set class when password hide or show. We can also set toggle hide show password input field.
In this full example i use bootstrap-show-password.js plugin for hide show password field. You can sole use this example simply by bellow small example.
Maybe It can help you...